/**
 * Zinsrechner - Styling
 * Vollständiges CSS für den Finanzierungsrechner
 *
 * @package Denkmalschutz
 */

/* CLAUDE: ===================================
   1. CSS-Variablen (Theme-Farbpalette)
   =================================== */

:root {
  /* CLAUDE: Primärfarben aus Theme */
  --zr-primary: #00274D;        /* Marineblau */
  --zr-primary-light: #003D73;
  --zr-primary-dark: #001933;

  /* CLAUDE: Akzentfarben */
  --zr-accent: #B8944D;         /* Gold */
  --zr-accent-light: #D4B579;
  --zr-accent-dark: #9A7A3D;

  /* CLAUDE: Graustufen */
  --zr-gray-50: #F9FAFB;
  --zr-gray-100: #F3F4F6;
  --zr-gray-200: #E5E7EB;
  --zr-gray-300: #D1D5DB;
  --zr-gray-400: #9CA3AF;
  --zr-gray-500: #6B7280;
  --zr-gray-600: #4B5563;
  --zr-gray-700: #374151;
  --zr-gray-800: #1F2937;
  --zr-gray-900: #111827;

  /* CLAUDE: Status-Farben */
  --zr-success: #10B981;
  --zr-error: #EF4444;
  --zr-warning: #F59E0B;

  /* CLAUDE: Abstände */
  --zr-spacing-xs: 0.5rem;
  --zr-spacing-sm: 0.75rem;
  --zr-spacing-md: 1rem;
  --zr-spacing-lg: 1.5rem;
  --zr-spacing-xl: 2rem;
  --zr-spacing-2xl: 3rem;

  /* CLAUDE: Schriftgrößen */
  --zr-text-xs: 0.75rem;
  --zr-text-sm: 0.875rem;
  --zr-text-base: 1rem;
  --zr-text-lg: 1.125rem;
  --zr-text-xl: 1.25rem;
  --zr-text-2xl: 1.5rem;
  --zr-text-3xl: 1.875rem;

  /* CLAUDE: Border-Radius */
  --zr-radius-sm: 0.25rem;
  --zr-radius-md: 0.5rem;
  --zr-radius-lg: 0.75rem;
  --zr-radius-xl: 1rem;

  /* CLAUDE: Schatten */
  --zr-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --zr-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --zr-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --zr-shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

/* CLAUDE: ===================================
   2. Container & Layout
   =================================== */

/* CLAUDE: Hauptcontainer */
.zr-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--zr-spacing-xl);
  background: #fff;
  border-radius: var(--zr-radius-xl);
  box-shadow: var(--zr-shadow-lg);
}

/* CLAUDE: Titel & Intro */
.zr-title {
  font-size: var(--zr-text-3xl);
  font-weight: 700;
  color: var(--zr-primary);
  margin: 0 0 var(--zr-spacing-md);
  line-height: 1.2;
}

.zr-intro {
  font-size: var(--zr-text-base);
  color: var(--zr-gray-600);
  margin: 0 0 var(--zr-spacing-xl);
  line-height: 1.6;
}

/* CLAUDE: ===================================
   3. Modus-Auswahl (Toggle)
   =================================== */

.zr-modus-selector {
  margin-bottom: var(--zr-spacing-2xl);
}

/* CLAUDE: Toggle-Container */
.zr-modus-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--zr-spacing-md);
  margin-bottom: var(--zr-spacing-xl);
}

/* CLAUDE: Modus-Button */
.zr-modus-btn {
  padding: var(--zr-spacing-lg);
  background: var(--zr-gray-50);
  border: 2px solid var(--zr-gray-200);
  border-radius: var(--zr-radius-lg);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--zr-spacing-xs);
}

.zr-modus-btn:hover {
  background: var(--zr-gray-100);
  border-color: var(--zr-primary-light);
}

.zr-modus-btn.active {
  background: var(--zr-primary);
  border-color: var(--zr-primary);
  color: #fff;
}

.zr-modus-btn.active .zr-modus-label {
  color: #fff;
}

.zr-modus-btn.active small {
  color: rgba(255, 255, 255, 0.8);
}

.zr-modus-label {
  font-size: var(--zr-text-lg);
  font-weight: 600;
  color: var(--zr-gray-900);
}

.zr-modus-btn small {
  font-size: var(--zr-text-sm);
  color: var(--zr-gray-500);
}

/* CLAUDE: ===================================
   4. Formular & Eingabefelder
   =================================== */

/* CLAUDE: 2-Spalten-Grid für Eingaben */
.zr-input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--zr-spacing-2xl);
  margin-bottom: var(--zr-spacing-xl);
}

@media (max-width: 768px) {
  .zr-input-grid {
    grid-template-columns: 1fr;
    gap: var(--zr-spacing-xl);
  }
}

/* CLAUDE: Spalten-Titel */
.zr-section-title {
  font-size: var(--zr-text-xl);
  font-weight: 600;
  color: var(--zr-primary);
  margin: 0 0 var(--zr-spacing-lg);
  padding-bottom: var(--zr-spacing-sm);
  border-bottom: 2px solid var(--zr-accent);
}

/* CLAUDE: Einzelnes Eingabefeld */
.zr-field {
  margin-bottom: var(--zr-spacing-lg);
}

/* CLAUDE: Label */
.zr-label {
  display: block;
  font-size: var(--zr-text-sm);
  font-weight: 500;
  color: var(--zr-gray-700);
  margin-bottom: var(--zr-spacing-xs);
}

.zr-required {
  color: var(--zr-error);
  margin-left: 0.25rem;
}

/* CLAUDE: Input-Wrapper (für Currency-Symbol) */
.zr-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

/* CLAUDE: Input-Feld */
.zr-input {
  width: 100%;
  padding: var(--zr-spacing-sm) var(--zr-spacing-md);
  padding-right: 3rem; /* CLAUDE: Platz für Currency-Symbol */
  font-size: var(--zr-text-base);
  color: var(--zr-gray-900);
  background: #fff;
  border: 2px solid var(--zr-gray-300);
  border-radius: var(--zr-radius-md);
  transition: all 0.2s ease;
}

.zr-input:focus {
  outline: none;
  border-color: var(--zr-primary);
  box-shadow: 0 0 0 3px rgba(0, 39, 77, 0.1);
}

.zr-input:invalid {
  border-color: var(--zr-error);
}

/* CLAUDE: Currency-Symbol (€, %, Jahre) */
.zr-currency {
  position: absolute;
  right: var(--zr-spacing-md);
  font-size: var(--zr-text-sm);
  font-weight: 500;
  color: var(--zr-gray-500);
  pointer-events: none;
}

/* CLAUDE: Hilfetext */
.zr-help {
  display: block;
  font-size: var(--zr-text-xs);
  color: var(--zr-gray-500);
  margin-top: var(--zr-spacing-xs);
}

/* CLAUDE: Fehlermeldung */
.zr-error {
  display: none;
  font-size: var(--zr-text-xs);
  color: var(--zr-error);
  margin-top: var(--zr-spacing-xs);
}

.zr-field.has-error .zr-error {
  display: block;
}

.zr-field.has-error .zr-input {
  border-color: var(--zr-error);
}

/* CLAUDE: ===================================
   5. Accordion (Nebenkosten, Tilgungsplan)
   =================================== */

.zr-accordion {
  margin-top: var(--zr-spacing-lg);
  border: 1px solid var(--zr-gray-200);
  border-radius: var(--zr-radius-md);
  overflow: hidden;
}

.zr-accordion-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--zr-spacing-md);
  background: var(--zr-gray-50);
  cursor: pointer;
  font-weight: 500;
  color: var(--zr-gray-700);
  transition: background 0.2s ease;
  list-style: none; /* CLAUDE: Entfernt Browser-Default-Marker */
}

.zr-accordion-toggle:hover {
  background: var(--zr-gray-100);
}

.zr-accordion-toggle::-webkit-details-marker {
  display: none; /* CLAUDE: Entfernt Webkit-Default-Marker */
}

.zr-accordion-icon {
  transition: transform 0.2s ease;
}

.zr-accordion[open] .zr-accordion-icon {
  transform: rotate(180deg);
}

.zr-accordion-content {
  padding: var(--zr-spacing-lg);
}

/* CLAUDE: ===================================
   6. Modus-Panels (Zins+Tilgung vs. Rate)
   =================================== */

.zr-modus-panel {
  transition: opacity 0.2s ease;
}

.zr-modus-panel[hidden] {
  display: none;
}

/* CLAUDE: ===================================
   7. Buttons
   =================================== */

.zr-actions {
  display: flex;
  gap: var(--zr-spacing-md);
  margin-top: var(--zr-spacing-xl);
}

/* CLAUDE: Button-Basis */
.zr-btn {
  padding: var(--zr-spacing-md) var(--zr-spacing-xl);
  font-size: var(--zr-text-base);
  font-weight: 600;
  border: none;
  border-radius: var(--zr-radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--zr-spacing-sm);
}

/* CLAUDE: Primary Button */
.zr-btn-primary {
  background: var(--zr-primary);
  color: #fff;
}

.zr-btn-primary:hover {
  background: var(--zr-primary-light);
  transform: translateY(-1px);
  box-shadow: var(--zr-shadow-md);
}

.zr-btn-primary:active {
  transform: translateY(0);
}

.zr-btn-primary:disabled {
  background: var(--zr-gray-300);
  cursor: not-allowed;
  transform: none;
}

/* CLAUDE: Secondary Button */
.zr-btn-secondary {
  background: var(--zr-gray-200);
  color: var(--zr-gray-700);
}

.zr-btn-secondary:hover {
  background: var(--zr-gray-300);
}

/* CLAUDE: Outline Button */
.zr-btn-outline {
  background: transparent;
  border: 2px solid var(--zr-primary);
  color: var(--zr-primary);
}

.zr-btn-outline:hover {
  background: var(--zr-primary);
  color: #fff;
}

/* CLAUDE: Loading-Spinner im Button */
.zr-btn-loader {
  display: none;
}

.zr-btn.is-loading .zr-btn-text {
  display: none;
}

.zr-btn.is-loading .zr-btn-loader {
  display: flex;
  align-items: center;
  gap: var(--zr-spacing-sm);
}

.zr-spinner {
  animation: zr-spin 1s linear infinite;
}

@keyframes zr-spin {
  to { transform: rotate(360deg); }
}

/* CLAUDE: ===================================
   8. Ergebnisbereich
   =================================== */

.zr-results {
  margin-top: var(--zr-spacing-2xl);
  padding-top: var(--zr-spacing-2xl);
  border-top: 2px solid var(--zr-gray-200);
}

.zr-results-title {
  font-size: var(--zr-text-2xl);
  font-weight: 700;
  color: var(--zr-primary);
  margin: 0 0 var(--zr-spacing-xl);
}

.zr-results-subtitle {
  font-size: var(--zr-text-xl);
  font-weight: 600;
  color: var(--zr-gray-900);
  margin: var(--zr-spacing-2xl) 0 var(--zr-spacing-lg);
}

/* CLAUDE: ===================================
   9. Kennzahlen-Grid (3 Kacheln)
   =================================== */

.zr-kennzahlen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--zr-spacing-lg);
  margin-bottom: var(--zr-spacing-2xl);
}

@media (max-width: 768px) {
  .zr-kennzahlen-grid {
    grid-template-columns: 1fr;
  }
}

/* CLAUDE: Einzelne Kennzahl-Karte */
.zr-kennzahl-card {
  padding: var(--zr-spacing-lg);
  background: linear-gradient(135deg, var(--zr-primary) 0%, var(--zr-primary-light) 100%);
  border-radius: var(--zr-radius-lg);
  color: #fff;
  box-shadow: var(--zr-shadow-md);
  display: flex;
  flex-direction: column;
  gap: var(--zr-spacing-sm);
}

.zr-kennzahl-icon {
  opacity: 0.8;
  margin-bottom: var(--zr-spacing-xs);
}

.zr-kennzahl-label {
  font-size: var(--zr-text-sm);
  opacity: 0.9;
}

.zr-kennzahl-value {
  font-size: var(--zr-text-2xl);
  font-weight: 700;
  margin-top: auto;
}

/* CLAUDE: ===================================
   10. Detail-Tabelle
   =================================== */

.zr-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--zr-text-sm);
}

.zr-table td {
  padding: var(--zr-spacing-sm) var(--zr-spacing-md);
  border-bottom: 1px solid var(--zr-gray-200);
}

.zr-table tr:last-child td {
  border-bottom: none;
}

.zr-table-value {
  text-align: right;
  font-weight: 500;
  font-family: 'Courier New', monospace; /* CLAUDE: Monospace für Zahlen */
}

.zr-table-highlight {
  background: var(--zr-gray-50);
}

.zr-table-highlight td {
  padding-top: var(--zr-spacing-md);
  padding-bottom: var(--zr-spacing-md);
}

/* CLAUDE: ===================================
   11. Tilgungsplan-Tabelle
   =================================== */

.zr-table-wrapper {
  overflow-x: auto;
}

.zr-tilgungsplan-table {
  min-width: 800px;
  table-layout: fixed; /* CLAUDE: Feste Spaltenbreiten für korrekte Ausrichtung */
  width: 100%;
}

.zr-tilgungsplan-table thead {
  background: var(--zr-primary);
  color: #fff;
}

.zr-tilgungsplan-table th {
  padding: var(--zr-spacing-sm) var(--zr-spacing-md);
  text-align: left; /* CLAUDE: Alle Headers linksbündig */
  font-weight: 600;
  font-size: var(--zr-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.zr-tilgungsplan-table th:first-child {
  width: 8%; /* CLAUDE: Feste Breite für Jahr */
}

.zr-tilgungsplan-table th:nth-child(2),
.zr-tilgungsplan-table th:nth-child(6) {
  width: 20%; /* CLAUDE: Restschuld-Spalten breiter */
}

.zr-tilgungsplan-table th:nth-child(3),
.zr-tilgungsplan-table th:nth-child(4),
.zr-tilgungsplan-table th:nth-child(5) {
  width: 17%; /* CLAUDE: Zinsen, Tilgung, Rate gleich breit */
}

.zr-tilgungsplan-table td {
  font-family: 'Courier New', monospace;
  text-align: left; /* CLAUDE: Alle Daten linksbündig */
  padding: var(--zr-spacing-sm) var(--zr-spacing-md);
}

.zr-tilgungsplan-table tbody tr:hover {
  background: var(--zr-gray-50);
}

/* CLAUDE: ===================================
   12. Export-Buttons
   =================================== */

.zr-results-actions {
  display: flex;
  gap: var(--zr-spacing-md);
  margin-top: var(--zr-spacing-xl);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .zr-results-actions {
    flex-direction: column;
  }
}

/* CLAUDE: ===================================
   13. Alert-Boxen (Fehler)
   =================================== */

.zr-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--zr-spacing-md);
  padding: var(--zr-spacing-lg);
  border-radius: var(--zr-radius-md);
  margin-top: var(--zr-spacing-xl);
}

.zr-alert-error {
  background: #FEE2E2;
  border: 1px solid #FCA5A5;
  color: #991B1B;
}

.zr-alert-icon {
  flex-shrink: 0;
}

.zr-alert-content {
  flex: 1;
}

.zr-alert-title {
  font-size: var(--zr-text-base);
  font-weight: 600;
  margin: 0 0 var(--zr-spacing-xs);
}

.zr-alert-message {
  font-size: var(--zr-text-sm);
  margin: 0;
}

/* CLAUDE: ===================================
   14. Utility-Klassen
   =================================== */

[hidden] {
  display: none !important;
}

/* CLAUDE: Screen-Reader-Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* CLAUDE: ===================================
   15. Responsive Breakpoints
   =================================== */

@media (max-width: 1024px) {
  .zr-container {
    padding: var(--zr-spacing-lg);
  }
}

@media (max-width: 640px) {
  .zr-container {
    padding: var(--zr-spacing-md);
  }

  .zr-modus-toggle {
    grid-template-columns: 1fr;
  }

  .zr-actions {
    flex-direction: column;
  }

  .zr-btn {
    width: 100%;
  }
}